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FN-5772: re-anchor nested task worktree paths

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Fix executor worktree invariant handling by re-anchoring nested task worktree paths to the actual git top-level.

- add nested worktree root detection that only re-anchors when the top-level is a registered worktree inside the configured worktrees directory
- update executor liveness gating and verifyWorktreeInvariants to persist re-anchored task.worktree values and retry checks safely
- emit a new run-audit git mutation (worktree:reanchored) and add reliability tests/docs coverage plus a patch changeset

Files changed:
 .changeset/fn-5772-worktree-reanchor.md            |  7 +++
 docs/architecture.md                               |  4 +-
 packages/engine/src/__tests__/reliability-interactions/executor-liveness-gate.test.ts                 | 33 ++++++++++
 packages/engine/src/__tests__/verify-worktree-invariants-missing.test.ts     | 62 +++++++++++++++++-
 packages/engine/src/__tests__/worktree-reanchor-nested-root.test.ts          | 73 ++++++++++++++++++++++
 packages/engine/src/executor.ts                    | 54 ++++++++++++++--
 packages/engine/src/run-audit.ts                   |  1 +
 packages/engine/src/worktree-pool.ts               | 63 +++++++++++++++++++
 8 files changed, 290 insertions(+), 7 deletions(-)

Fusion-Task-Id: FN-5772

Fusion-Task-Lineage: 475de161-7bc1-4359-bb76-20c4c07196d9
This commit is contained in:
gsxdsm
2026-05-31 08:25:03 -07:00
parent 5b4eecb5d4
commit b154844286
8 changed files with 290 additions and 7 deletions
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33
packages/engine/src/__tests__/reliability-interactions/executor-liveness-gate.test.ts
View File

@@ -103,6 +103,39 @@ describe("reliability interactions: FN-4935 executor liveness gate", () => {
expect(events.some((event) => (event.type === "worktree:incomplete-detected" || event.mutationType === "worktree:incomplete-detected") && event.metadata?.source === "executor-liveness-gate" && event.metadata?.terminalAction === "requeue-todo")).toBe(true);
});
it("re-anchors nested subdir classification failures instead of requeueing", async () => {
vi.spyOn(worktreeAcquisition, "acquireTaskWorktree").mockResolvedValue({
worktreePath: "/repo/.worktrees/gentle-flame/packages/core",
branch: "fusion/fn-4935-t",
source: "existing",
hydrated: true,
isResume: true,
});
vi.spyOn(worktreePool, "classifyTaskWorktree").mockResolvedValue({ ok: false, classification: "incomplete", reason: "missing .git metadata" });
const reanchorSpy = vi.spyOn(worktreePool, "detectNestedWorktreeRoot").mockResolvedValue({ reanchored: true, root: "/repo/.worktrees/gentle-flame" });
mockedExecSync.mockImplementation((cmd: string) => {
if (cmd.includes("rev-parse HEAD")) return Buffer.from("abc123\n");
if (cmd.includes("rev-parse --show-toplevel")) return Buffer.from("/repo/.worktrees/gentle-flame\n");
if (cmd.includes("rev-parse --abbrev-ref HEAD")) return Buffer.from("fusion/fn-4935-t\n");
if (cmd.includes("rev-list --count")) return Buffer.from("1\n");
return Buffer.from("");
});
const store = createMockStore();
const executor = new TaskExecutor(store as any, "/repo");
await executor.execute(makeTask());
expect(reanchorSpy).toHaveBeenCalled();
expect(store.updateTask).toHaveBeenCalledWith("FN-4935-T", expect.objectContaining({ worktree: "/repo/.worktrees/gentle-flame" }));
expect(store.logEntry).toHaveBeenCalledWith("FN-4935-T", expect.stringContaining("Re-anchored nested task.worktree"), undefined, expect.anything());
expect(
store.logEntry.mock.calls.some(
(call: unknown[]) => call[0] === "FN-4935-T" && typeof call[1] === "string" && call[1].includes("not_usable_task_worktree"),
),
).toBe(false);
expect(mockedCreateFnAgent).toHaveBeenCalled();
});
it.each([
"missing",
"incomplete",